unity官方demo学习之Stealth（五）游戏控制器

五，游戏控制器  主要：记录主角最后出现的位置
1，创建空对象，命名为gameController，设置tag，gameController，将audio中的music_normal拖入音频剪辑中（这是正常游戏音乐背景），勾选paly
   on awake，loop
2，在gameController下创建空的子对象，命名为secondaryMusic，拖进去music_panic音频，勾选loop，设置volume为0 （玩家被发现时音乐背景）

3，为gameController添加脚本DoneLastPlayerSighting

using UnityEngine;
using System.Collections;
public class DoneLastPlayerSighting : MonoBehaviour
{
public Vector3 position = new Vector3(1000f, 1000f, 1000f);
// The last global sighting of the player.
public Vector3 resetPosition = new Vector3(1000f, 1000f, 1000f);	// The default position if the player is not in sight.
public float lightHighIntensity = 0.25f;
// The directional light's intensity when the alarms are off.
public float lightLowIntensity = 0f;
// The directional light's intensity when the alarms are on.
public float fadeSpeed = 7f;
// How fast the light fades between low and high intensity.
public float musicFadeSpeed = 1f;
// The speed at which the
private DoneAlarmLight alarm;
// Reference to the AlarmLight script.
private Light mainLight;
// Reference to the main light.
private AudioSource panicAudio;
// Reference to the AudioSource of the panic msuic.
private AudioSource[] sirens;
// Reference to the AudioSources of the megaphones.
void Awake ()
{
// Setup the reference to the alarm light.
alarm = GameObject.FindGameObjectWithTag(DoneTags.alarm).GetComponent<DoneAlarmLight>();
// Setup the reference to the main directional light in the scene.
mainLight = GameObject.FindGameObjectWithTag(DoneTags.mainLight).light;
// Setup the reference to the additonal audio source.
panicAudio = transform.FindChild("secondaryMusic").audio;
// Find an array of the siren gameobjects.
GameObject[] sirenGameObjects = GameObject.FindGameObjectsWithTag(DoneTags.siren);
// Set the sirens array to have the same number of elements as there are gameobjects.
sirens = new AudioSource[sirenGameObjects.Length];
// For all the sirens allocate the audio source of the gameobjects.
for(int i = 0; i < sirens.Length; i++)
{
sirens[i] = sirenGameObjects[i].audio;
}
}
void Update ()
{
// Switch the alarms and fade the music.
SwitchAlarms();
MusicFading();
}
void SwitchAlarms ()
{
// Set the alarm light to be on or off.
alarm.alarmOn = (position != resetPosition);
// Create a new intensity.
float newIntensity;
// If the position is not the reset position...
if(position != resetPosition)
// ... then set the new intensity to low.
newIntensity = lightLowIntensity;
else
// Otherwise set the new intensity to high.
newIntensity = lightHighIntensity;
// Fade the directional light's intensity in or out.
mainLight.intensity = Mathf.Lerp(mainLight.intensity, newIntensity, fadeSpeed * Time.deltaTime);
// For all of the sirens...
for(int i = 0; i < sirens.Length; i++)
{
// ... if alarm is triggered and the audio isn't playing, then play the audio.
if(position != resetPosition && !sirens[i].isPlaying)
sirens[i].Play();
// Otherwise if the alarm isn't triggered, stop the audio.
else if(position == resetPosition)
sirens[i].Stop();
}
}
void MusicFading ()
{
// If the alarm is not being triggered...
if(position != resetPosition)
{
// ... fade out the normal music...
audio.volume = Mathf.Lerp(audio.volume, 0f, musicFadeSpeed * Time.deltaTime);
// ... and fade in the panic music.
panicAudio.volume = Mathf.Lerp(panicAudio.volume, 0.8f, musicFadeSpeed * Time.deltaTime);
}
else
{
// Otherwise fade in the normal music and fade out the panic music.
audio.volume = Mathf.Lerp(audio.volume, 0.8f, musicFadeSpeed * Time.deltaTime);
panicAudio.volume = Mathf.Lerp(panicAudio.volume, 0f, musicFadeSpeed * Time.deltaTime);
}
}
}

变量：敌人或摄像机最后发现玩家的位置 （3个1000f是 代表不存在的坐标，AI不知道主角的位置，AI得不到主角的坐标会将值设为这个）
      重置主角坐标点为 默认坐标，即玩家没有被发现
      两个分别为主光线的最大，最小强度
      光线强度变化速率
      背景音乐切换速率


      警报光线脚本引用
      主光灯引用
      恐怖音乐组件引用
      警报喇叭数组


函数：awake()，设置alarm脚本DoneAlarmLight  通过tag获得对象，再获得其组件脚本文件DoneAlarmLight  
      设置主光线  通过tag获得对象，通过快捷方式获得该组件引用
      设置恐怖音乐组件  通过transform.FindChild查找子元素对象，然后再通过快捷方式获得该组件引用
      获得警报喇叭的数组 通过该标签获得该对象存入数组
      创建siren数组，长度与上面数组一致 
      
      依次获取sirenGameObjects中的AudioSource组件存入siren数组中


      Update()，调用切换警报光和音乐切换函数


      SwitchAlarms (),切换警报光函数
      通过玩家当前位置和重置位置的比较设置是否开警报灯
根据当前位置与重置位置的关系（不相等即玩家暴露）设置新的主光的强度，然后平滑的变化到新的光强
对于所有警报灯，若玩家暴露且没开，那就开；玩家没暴露，就关

      MusicFading()
玩家暴露时，背景音乐变0，恐怖音效变大；否则，反之


最后将gameController拖入prefab中
到此，可以运行一下感受诡异的气氛。。。

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